Power steering pump and rack and pinion replaced. when turning hard right or left the wheel locks up plus squirts large amounts of fluid. I have no idea where it could be coming from? puddles are located on drivers side near front tire. please help!
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Which power steering system does your vehicle have ? EPS - electric power steering or hydraulic power steering . Do you have a EPS light lit on the instrument cluster ?
Power Steering System Description and Operation (EPS)
The power steering system reduces the amount of effort needed to steer the vehicle. The system uses the powertrain control module (PCM), body control module (BCM), power steering control module (PSCM), discrete battery voltage supply circuit, steering shaft torque sensor, steering wheel position sensor, power steering motor, driver information center (DIC), and the serial data circuit to perform the system functions. The PSCM and the power steering motor are serviced as an assembly and are serviced separately from the steering column assembly. The steering shaft torque sensor and the steering wheel position sensor are not serviced separately from each other or from the steering column assembly. The steering column assembly does not include the power steering motor and module assembly.
steering rack or gear . 2X2 - 4X4 engine . Depends on steering system .
When you turn the steering wheel, the steering gear rotates the pitman arm which forces the relay rod to one side. The tie rods connect to the relay rod with the ball studs. The tie rods transfer the steering force to the wheels. Use the tie rods in toe adjustments. The tie rods are adjustable. The pitman arm support the relay rod. The idler arm pivots on a support attached to the frame rail and the ball stud attaches to the relay rod.
The 2 tie rod are threaded into the tube and secured with jam nuts. Right and left hand threads are used in order to permit the adjustment of toe.
Binding linkage , steering gear worn etc....
Power Steering System Description and Operation (w/o Electro-Hydraulic Steering)
The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.
The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir:
• Mounted to the front of the dash panel
• Mounted to the inner fender
• Mounted to a bracket on the engine
The 2 basic types of power steering gears are listed below:
• A recirculating ball system
• A rack and pinion system
In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.
In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.
The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.
The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.
In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.
Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to 1 side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. Tie rods transfer this force to the front wheels, which turn the vehicle right or left.
Your best bet , take it to a qualified repair shop.
look for split in the hard line where fluid is leaking. If you see split, change the line only. make sure power steering reservoir is filled and rack and pinion is full (charge with steering wheel left/right motion). You should be able to remove wheel and inside wheel panel to see power steering fluid shooting out of any hole. There is hydraulic pressure on the lines.
Hey Kumar,
Does the steering get easier when it gets hot? If it get easier when hot, its the rack and pinion gear. The valve body (actually a teflon composition ring(s) o-rings/valve bore housing are getting worn to the point where they are not controlling the fluid flow when its cold,, when the rack and pinion gets hot, the valve bore expands and "corrects" the clearance which in turn, controls the fluid flow. The valve body bore in the rack and pinion housing is worn where the teflon rings ride against the bore. This is nothing that can be fixed except by replacing the entire rack and pinion gear. Drain ALL the power steering fluid from the pump also and fill with fresh new fluid.
definitely check ur belt condition and tightness..very important.. also wiggle or pry on pwr steering pump pulley to make sure ur shaft hasnt broken .not hard but few wiggles w long prybar should do it. very possible u have a bad pwr steering pump. no pressure in system, or very old burnt out unflushed fluid,dirty fluid.not common.
a few possibilities.
Low power steering fluid. check for correct amount on pump filler measureing guage.
Loose power steering belt. check to see if the belt slips over the power steering pulley while trying to turn the steering wheel. may need an assistant.
last, but most expensive. Rack and pinion steering bar is defective and needs replacing.
To find out witch it is,pump or rack and pinion,break loose the presure line on the power steering pump with a wench.Start the car and turn the steering wheel back and forth,you may need to loosen the nut on the power steering hose two or three turns to get the fluid to shoot out.It should come out pretty forceful.If it doesn`t,then replace the pump.If it does come out really powerful,replace the rack and pinion.
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